Re: [boost] [typeof] Weird VC++ compiler bug

Subject: Re: [boost] [typeof] Weird VC++ compiler bug
From: Andrzej Krzemienski (akrzemi1_at_[hidden])
Date: 2015-05-27 09:53:29

2015-05-23 18:33 GMT+02:00 Steven Watanabe <watanabesj_at_[hidden]>:

> AMDG
>
> On 05/23/2015 09:44 AM, Peter Dimov wrote:
> >
> > Why doesn't Typeof use decltype on VS 2013?
> >
>
> Probably because Typeof hasn't had a maintainer
> since before decltype.  It doesn't appear to
> use decltype for any compiler.
>

I don't think it can. The semantics of BOOST_TYPEOF is that of:
auto x = expr;

The semantics of decltype are quire different. For instance, auto and
BOOST_TYPEOF and GCC's __typeof__ never deduce references -- always values.
decltype on the other hand can deduce references.

I guess BOOST_TYPEOF could be implemented with decltype(auto).

Regards,
&rzej